console.log(null instanceof Object);
console.log(NaN == NaN);
console.log(null === undefined);
console.log(null == undefined);

/**
 * NaN 是 a not number 的缩写
 * NaN 和任何变量都不相等,包括NaN自己
 */
console.log(parseInt(12.76));
console.log(Number("abd123"));
console.log(isNaN("abd") == NaN);
console.log(typeof 65436 == "number");
console.log(typeof NaN);
console.log("类型判断:",typeof(4*'6'));

console.log("类型的创建");

function foo(par){
	var num = 5
	//这个对象创建了
	fun = function(y){
		return (par+y+(++num))
	}
}
console.log(foo(2));
console.log(fun(2));
console.log(fun(2));
console.log(fun(2));
console.log(fun(2));
console.log(fun(2));


console.log("parseInt-----------");

console.log(parseInt(3, 8));
console.log(parseInt(3, 0));
console.log(parseInt("15", 16));

console.log("时间---------------");

var data = new Date();
console.log("一周中的一天:",data.getDay());
console.log("一月中的一天",data.getDate());
console.log("1970,1,1到至今的毫秒数:",data.getTime());
console.log(data.getFullYear());
